Home / 138,827.42-191,583.02-81,467.57

Finding the Fourth Proportional to 138,827.42, 191,583.02 and 81,467.57

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Solution

The fourth proportional to 138,827.42, 191,583.02 and 81,467.57 is: 112,425.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,827.42 : 191,583.02 = 81,467.57 : x
  2. Step 2: Convert to fraction form
    138,827.42/191,583.02 = 81,467.57/x
  3. Step 3: Cross multiply
    138,827.42x = 191,583.02 × 81,467.57
  4. Step 4: Simplify right side
    138,827.42x = 15,607,803,775.29
  5. Step 5: Solve for x
    x = 15,607,803,775.29/138,827.42
  6. Step 6: Final answer
    x = 112,425.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.